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rose gold necklace cheap Emerald-the most precious gem of the beryl family

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German glasses brille extends from beryl, because the earliest spectacle lenses were ground with colorless beryl. The color of beryl gemstones is one of the classification criteria.

(1) Emerald. With chromium or iron as the color characteristic, green beryl with emerald green color can be slightly yellow or blue, and its typical characteristic is the chromium absorption line in the spectrum.

(2) Aquamarine. Refers to the sky blue to greenish blue beryl. Its color is caused by iron ions, and it is generally not lighter in color.

(3) Yellow beryl. Green-yellow to brown-yellow beryl, its color is also iron-induced.

(4) Pink beryl. Orange-red to lavender beryl, its color is mostly caused by manganese. Some beryls also contain cesium ions. The pink beryl that is colored by cesium ions is called morganite or pink beryl, also called morganite.

Emerald (Emerald), the mineral name is beryl, depending on the chromium and vanadium content. Emerald is a beryl containing a large amount of chromium. The production of emerald does not require a particularly high temperature and pressure, but it is also strictly limited by geological conditions. The formation conditions are harsh. It is generated in a gaseous hydrothermal environment and requires chromium nearby. source. Carbonaceous black inclusions are often present in the crystals.

The English name of emerald is Emerald, which symbolizes kindness, kindness and loyalty. The use of emeralds can be traced back to ancient Greece and Persia, and no one loves emeralds more than the ancient Romans. The ancient Romans believed that emeralds are good for the eyes, and looking at emeralds for a few minutes can restore eye fatigue. From the perspective of modern medicine, it is not unreasonable. It is recognized that human eyes can relax the eyes by seeing green objects. Emeralds are the most beautiful green gems on the earth. The color of high-quality emeralds is unforgettable, while other green gems pale in comparison. . It can be said that emeralds are the king of green gems. High-quality emeralds are invaluable, even more than diamonds.

The main producer of emeralds in the world is Colombia, which accounts for more than 90% of the world’s total emerald production, in addition to South Africa, India, Brazil, Tanzania and Zambia. Colombian emeralds are recognized as the best in the world. Their color is pure green, a few are yellow-green or blue-green, the crystals weigh from ten to tens of carats, and the huge ones can reach several kilograms. They are not only of good quality, but also large in output. The emeralds from Russia and South Africa are also of good quality, with a slightly lighter color than Colombia’s, with more internal defects. The quality of products in Brazil and India is poor and the prices are much lower.

 

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